What drugs can affect a Polygraph test?
Anti-depressant medication such as Lithium, Prozac, Valium or Xanax DO NOT allow someone to ‘beat’ a polygraph, contrary to some claims. It will give skewed results that are immediately seen in the Pre-test Process. Only the Examiner, through the Pre-test Process, can determine if the subject can take a Polygraph while on these drugs.